package com.itheima.reggie.filter;


import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
//@WebFilter("/*")
public class LoginFilter2 implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        //1、获取本次请求的URI
        String requestURI = request.getRequestURI();
        //需要放行的路径
        String[] urls=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/",
                "/front/"
        };

        for (String url : urls) {
            //2、判断本次请求是否需要处理
            if(requestURI.contains(url)){
                log.info("本次请求{}不需要处理",requestURI);
                filterChain.doFilter(request,response);
                return;
            }
        }
        //3、判断登录状态，如果已登录，则直接放行
        Long empId = (Long) request.getSession().getAttribute("employee");
        if(empId!=null){
            log.info("用户已登录，用户id为：{}",request.getSession()
                    .getAttribute("employee"));
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");
        //5、如果未登录则返回未登录结果，通过输出流方式向客户端页面响应数据
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
        return;
    }
}
